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https://issues.apache.org/jira/browse/DERBY-2582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12492216
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Knut Anders Hatlen commented on DERBY-2582:
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It is also possible to add wrapper methods with these signatures to the old
data sources:
public boolean isWrapperFor(Class iface)
public Object unwrap(Class iface)
This will work as long as you access them through the ConnectionPoolDataSource
interface (or the Wrapper interface) on Java 1.6, like this:
ConnectionPoolDataSource ds = myEmbeddedConnectionPoolDataSource;
if (ds.isWrapperFor(EmbeddedConnectionPoolDataSource.class) {
EmbeddedConnectionPoolDataSource ds2 =
ds.unwrap(EmbeddedConnectionPoolDataSource.class);
}
I'm not saying it's a good solution, but perhaps it could reduce the problem?
> EmbeddedConnectionPoolDataSource does not implement java.sql.Wrapper but
> reports JDBC 4 compliance when run with JDK 6
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-2582
> URL: https://issues.apache.org/jira/browse/DERBY-2582
> Project: Derby
> Issue Type: Sub-task
> Components: JDBC
> Affects Versions: 10.2.2.1
> Environment: JDK 6
> Reporter: Stan Bradbury
>
> Software that checks the value returned by the dataseMetadata method
> getJDBCMajorVersion for JDBC compliance level and, based on the value, takes
> different paths in the code will fail unexpectedly accessing java.sql.Wrapper
> when loading EmbeddedConnectionPoolDataSource in a JDK 6 environment.
> EmbeddedConnectionPoolDataSource reports a compliance level of 4 when loaded
> in a JDK 6 environment. It returns JDBC 4 objects but the Datasource itself
> does NOT satify the JDBC 4.0 interface Wrapper and so, not being fully
> compliant, should not report JDBC 4 compliance.
> JSR 221 does not detail the behavior of the dataseMetadata method
> getJDBCMajorVersion but the description in Section 6.3, JDBC 4.0 API
> Compliance, states: "A driver that is compliant with the JDBC 4.0
> specification must .. Fully implement .. java.sql.Wrapper". As Dan stated in
> his comment on DERBY-2488,
> (http://issues.apache.org/jira/browse/DERBY-2488#action_12485033)
> EmbeddedConnectionPoolDataSource does not implement Wrapper.
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